Instruction Manual

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Controlle

r N120

INSTRUCTIONS MANUAL

– V2.0x

INTRODUCTION

N120 has all the main features needed for control and alarm functions in

different industrial processes. It accepts in a single model the majority

of the sensors and signals used in the industry and provides the main

output types required for dual action control (Heat and Cool) and

alarm monitoring.

The configuration can be performed directly on the controller or

through the USB interface. The NConfig software (free) is the

configuration management tool. Connected to the USB of a Windows

computer, the controller is recognized as a serial communications

port (COM) running with a Modbus RTU protocol.

Through the USB interface, even if disconnected from the power

supply, the configuration performed in a piece of equipment can be

can be saved in a file and repeated in other pieces of equipment that

require the same configuration.

The N120 in addition to being a controller is an electronic datalogger.

The logger function operates independently of the controller. The

parameter setting of the datalogger is made using LogChart-II

software.

It is important that the users read carefully this manual before using

the controller. Verify if the release of this manual matches the

instrument version (the firmware version is shown when the controller

is energized).

CARACTERÍSTICAS PRINCIPAIS

• Capable of storing 32700 registers (datalogger);

• Universal multi-sensor input without hardware change;

• Protection for open sensor in any condition;

• Relay and logic pulse control outputs available in the standard

model;

• Self-tuning of PID parameters;

• Automatic / Manual function with “bumpless” transfer;

• Up to 4 alarm outputs, with functions of minimum, maximum,

differential (deviation), open sensor and event;

• Timer functions that can be associated to the alarms;

• Digital input with 4 functions;

• Programmable soft-start;

• 20 setpoint profile programs with 9 segments each, with the ability

to be linked together for a total of 180 segments;

• Password for parameters protection;

• Função LBD (loop break detector);

• Universal power supply: 100-240 Vac, ±10 %.

OPERATION

The controller front panel is shown in Fig. 1.

Fig. 1 – Front panel elements

Display: Shows the value and status of the controller parameters.

COM indicator: Flashes to indicate communication activity in the

RS485 interface.

TUNE indicator: Stays ON while the controller is in tuning process.

MAN indicator: Signals that the controller is in the manual control

mode.

RUN indicator: Indicates that the controller is active, with the control

output and alarms enabled.

OUT indicator: For relay or pulse control output; it reflects the actual

state of the output. If an analog output is assigned for control, the

OUT indicator lights continuously.

A1, A2, A3 and A4 indicators: signalize the occurrence of alarm

situation.

P Key (Program key): used to walk through the menu

parameters.

Back Key: used to retrocede parameters.

Increment key and

- Decrement key: allow altering the

values of the parameters.

When the controller is turned on, its firmware version is delayed for 3

seconds, after which the controller starts normal operation. The

values of PV and SP are displayed and the outputs are enabled.

In order to operate appropriately, the controller needs a configuration

that is the definition of each one of the several parameters presented by

the controller. The user must be aware of the importance of each

parameter and for each one determine a valid condition or a valid value.

Important:

Always the first parameter to set is the input type.

The parameters are grouped in levels according to their functionality

and operation easiness. The 7 levels of parameters are:

LEVEL ACCESS

1 - Operation Free access

2 - Tuning

Reserved access

3- R&S Programs

4- Alarms

5- Scale

6- Outputs

7- Calibration

Table 1 – Cycles of Parameters

Summary of content (14 pages)

PAGE 1
Controller N120 INSTRUCTIONS MANUAL – V2.0x INTRODUCTION N120 has all the main features needed for control and alarm functions in different industrial processes. It accepts in a single model the majority of the sensors and signals used in the industry and provides the main output types required for dual action control (Heat and Cool) and alarm monitoring. The configuration can be performed directly on the controller or through the USB interface.
PAGE 2
The parameters in the operation level have easy access through the key P . The access deeper levels use the combination of keys: P and B pressed simultaneously Press P to advance or B to retrocede parameters within a level. At the end of each level, the controller returns to the operation level. Keep pressing the P key to move fast forward in the level. Alternatively, the controller returns to the operation level after pressing the B key for 3 seconds.
PAGE 3
• lo – Alarm of Absolute Minimum Value It is activated when the measured value is below the value defined in the alarm Setpoint. • ki – Alarm of Absolute Maximum Value It is activated when the measured value is above the value defined in the alarm Setpoint. • dif – Alarm of Differential Value In this function, the parameters “SPA1”, “SPA2”,”SPA3” and “SPA4” represent the PV deviation as compared to the main SP.
PAGE 4
When the application requires both heating and cooling at the same time, you must set the parameters ACt=re and adjust the overlap (OLAP) to determine the type of operation. There are three situations: OLAP > 0; when there are overlapping between heating and cooling actions. Control output Pb1 Pb2 Output 1 Output 2 Set Point Process variable Overlap OLAP < 0; for setting a dead-band.
PAGE 5
Sensor Input Connections Fig. 3b – Input wiring, outputs, power supply and serial communiction connections Fig. 2a – Screws mounting holes. Frontal view The input types 0~20 and 4~20 mA are not available in the controller’s standard model, although shown as an option at the Type parameter. These inputs are only available in some custom models. The models with 0~20 and 4~20 mA inputs do not accept 0~5 V and 0~10 V inputs types.
PAGE 6
TUNING LEVEL Atvn Off Fast Full self rslf tght – Turned off. (no PID tuning) – automatic tuning. – More accurate automatic tuning. – Precise + auto - adaptative tuning – Forces one new precise automatic precise + auto - adaptative tuning. – Forces one new precise automatic + auto adaptative tuning when Run = YES or controller is turned on. Pb1 Proportional Band. Value of the term P of the control 1 mode PID, in percentage of the maximum span of the input type. Select zero for ON/OFF control.
PAGE 7
xya3 xya4 at which it is turned off (in engineering units). A1t1 A2t1 A3t1 A4t1 A1t2 A2t2 A3t2 A4t2 Alarm Time t1. Defines the temporization time t1, in seconds, for the alarms. Defines the temporization time t1, in seconds, for the alarms time functions. flsh The value 0 (zero) disables the function. Alarm Time t2. Define intervalo de tempo t2 para a temporização nos acionamentos dos alarmes. Em segundos. O valor 0 (zero) desabilita a função. Flash.
PAGE 8
ACCESS PASSWORD: The protected levels, when accessed, request the user to provide the Access Password for granting permission to change the configuration of the parameters on these cycles. The prompt PASS precedes the parameters on the protected levels. If no password is entered, the parameters of the protected cycles can only be visualized. The Access Code is defined by the user in the parameter Password Change (PAS.(), present in the Calibration level. The factory default for the password code is 1111.
PAGE 9
possible undesirable effects must be considered before beginning the controller's use, and preventive measures must be adopted in order to assure the integrity of the process and users. The “TUNE” signaling device will stay on during the tuning process. In the case of PWM or pulse output, the quality of tuning will also depend on the cycle time adjusted previously by the user.
PAGE 10
MAINTENANCE PROBLEMS WITH THE CONTROLLER Connection errors and inadequate programming are the most common errors found during the controller operation. A final revision may avoid loss of time and damages. The controller displays some messages to help the user identify problems. MESSAGE DESCRIPTION OF THE PROBLEM ---- Open input. No sensor or signal. Err1 Err6 Connection and/or configuration errors. Check the wiring and the configuration.
PAGE 11
APPENDIX 1 - SOFTWARE LOGCHART-II INSTALLING LOGCHART-II LogChart II is the software provided with the logger to allow for configuration and data offload. To install, run the LC_II_Setup.exe file provided with the CD. Note: Be sure your Windows date separator is configured as a slash: dd/mm/yy or dd/mm/yyyy. RUNNING LOGCHART-II When you open LogChart-II the main window is displayed: General Information: Information field.
PAGE 12
After filling all the fields select "OK", and the configuration will be sent to the logger. Important: Setting the N120 will erase all the records present in its data memory. COLLECTING DATA AND VIEWING The data acquired by the controller can be transferred to a PC using the LogChart-II software, which presents in graphical and table form. The data can be saved in files for future analysis and comparisons. Fig.
PAGE 13
Fig. 9a – Determining the COM port. Fig. 10b - Accessing Advanced COM port setting. IMPORTANT RECOMMENDATION To improve communication of the USB interface is recommended to set the Latency Timer. This parameter can be modified by accessing the "Advanced Settings for COMx" as Fig. 10a and Fig. 10b window. As shown in Fig 11, the "Latency Timer (ms)" parameter must be set to value 4. Fig. 9b - Determining the COM port.
PAGE 14
ANEXO 2 –SERIAL COMMUNICATION 0001 PV Write: Not allowed. The controller can be supplied with an asynchronous RS-485 digital communication interface for master-slave connection to a host computer (master). The controller works as a slave only and all commands are started by the computer which sends a request to the slave address. The addressed unit sends back the requested reply.